Tattoo artist Dave Hurban of Dynasty Tattoo in Newfield, New Jersey,
likes to have his iPod Nano handy, so he decided to attach it to his wrist
with magnets:

Hurban explained that the technique he used to get the four magnets
under his skin to hold the iPod in place is actually a fairly typical
one in the world of body piercing. “Those magnets are actually
called micro-dermal anchors,” Dave explained, “and in body
piercing they are very common. The tops are actually just 5 millimeter
magnetic tops.” If you check out the admittedly
cringe-worthy video of the process that the design firm Kaleidoscope
Kreative shot, you can witness Hurban planting those very anchors, with
a look of placid concentration on his face. “I took the ends of
magnets and actually adhered them to the back of the iPod, and that’s
how they click into my skin.”